Last Frost Dates Canada 2026 — All 36 Cities

The dates shown are historical averages based on Environment and Climate Change Canada climate normals (1991–2020). The actual last frost in any given year can be 2–4 weeks earlier or later than the average. The "2026" in the page title reflects the current season — the underlying climate normal dates are used annually and updated every decade as climate data accumulates. A warm spring can bring the last frost 2–3 weeks early; a cold late spring can push it 2–3 weeks late.

Use the frost date calculator — it covers hundreds of Canadian cities and communities beyond the 36 major cities listed here. Alternatively, find the nearest listed city in a similar hardiness zone and use a ±1 week adjustment based on your latitude and proximity to large bodies of water (lakes and oceans moderate temperatures and shift frost dates).

Plant hardiness zones (the Canadian system uses Zones 0–8) are based on average annual minimum winter temperatures — the coldest it gets in a typical winter. Frost dates (last spring frost, first fall frost) are based on the dates of 0°C temperatures in spring and fall. They're related but distinct: Victoria (Zone 8b) has both a mild winter and an early last frost. Ottawa (Zone 5a) has cold winters and a late last frost. Prairie cities often have colder zones than their frost dates suggest because of extremely cold winters (-30°C to -40°C) despite relatively moderate spring and fall temperatures.

Canada's last frost dates span from March 10 in Victoria (Zone 8b) to May 31 in Sudbury (Zone 4b) — a range of nearly three months across the country. Major city dates for 2026: Victoria March 10, Vancouver March 15, Toronto April 20, Montreal May 9, Ottawa May 9, Calgary May 23, Edmonton May 14, Winnipeg May 25, Halifax May 10. These are historical averages based on Environment and Climate Change Canada climate normals (1991–2020) — individual years vary by 2–4 weeks.

Last frost dates in 2026 follow historical climate normals — they are not affected by the calendar year. Victoria's last frost is around March 10, Vancouver March 15, Toronto and Windsor April 20, Hamilton and Brampton April 25, Montreal and Ottawa May 9, Calgary May 23, Edmonton May 14, Winnipeg and Saskatoon May 25, Sudbury May 31. These dates represent the 50th percentile historical average — meaning half of years see the last frost before this date, half after. Add a 1–2 week buffer for frost-sensitive crops like tomatoes and peppers.

Victoria, BC has the earliest last frost date of any major Canadian city — around March 10, with a 280-day frost-free growing season. Vancouver, Burnaby, and Surrey follow at March 15. Nanaimo is March 20. These coastal BC cities benefit from Pacific Ocean moderation that prevents hard freezes for most of the winter. By comparison, the latest last frost is Sudbury at May 31 — a difference of 82 days between Canada's earliest and latest major-city frost dates.

Sudbury, Ontario has the latest last frost date of any major Canadian city covered here — May 31 (Zone 4b), with only about 108 frost-free days. Other late-frost cities: Saskatoon and Winnipeg (May 25), Calgary and Barrie (May 23 and May 21), Quebec City (May 17), Red Deer and Edmonton (May 19 and May 14). Prairie cities have short but intense growing seasons — hot summers compensate for the brief frost-free window, allowing good harvests of fast-maturing crops.

Your last frost date is the pivot point for your entire planting schedule. Count backwards to find indoor seed-starting dates: start tomatoes 6–8 weeks before last frost, peppers 8–10 weeks before. Count forwards for direct sowing: plant beans and cucumbers 1–2 weeks after last frost when soil is warm. For transplanting frost-sensitive crops like tomatoes outdoors, add a 1–2 week buffer after the average last frost date — average means 50% of years see a late frost after that date, so the buffer reduces your risk. The frost calculator on this site generates a full planting calendar from your city's dates.